As a result of clinical studies conducted on scalp problems (psoriasis-seborrheic dermatitis - alopecia areata) and immune system diseases, it has been proven that the selenium element helps prevent disease and supports the treatment. Hair loss can generally be caused by iron and zinc element deficiency (Please consult your physician). Improving hair quality - rapid hair growth. Biotin is the vitamin that the body needs most to help repair hair and improve nail quality. Feb Biotin is a food supplement containing Vit Iron Biotin Zinc Selenium. (Does not replace medication)